CN111338123B

CN111338123B - Display panel, manufacturing method thereof and display device

Info

Publication number: CN111338123B
Application number: CN202010267729.0A
Authority: CN
Inventors: 顾跃凤; 王建栋
Original assignee: Shanghai Tianma Microelectronics Co Ltd
Current assignee: Shanghai Tianma Microelectronics Co Ltd
Priority date: 2020-04-08
Filing date: 2020-04-08
Publication date: 2023-01-17
Anticipated expiration: 2040-04-08
Also published as: CN111338123A

Abstract

The invention discloses a display panel, a manufacturing method thereof and a display device. An embodiment of the present invention provides a display panel, including: a display layer having a plurality of first sub-pixels and a plurality of second sub-pixels; the light splitting structure comprises a plurality of first light splitting units and a plurality of second light splitting units, at least one of the first light splitting units and the second light splitting units comprises a light modulation structure, the light modulation structure comprises a plurality of substructures, and the plurality of substructures are provided with a plurality of action surfaces for changing the emergent direction of light entering the light modulation structure; the light incident in the first direction corresponding to each first sub-pixel is emitted along the second direction through the first light splitting unit to form a first visual picture, the light incident in the first direction corresponding to each second sub-pixel is emitted along the third direction through the second light splitting unit to form a second visual picture, and the first direction, the second direction and the third direction are different in direction. According to the display panel provided by the embodiment of the invention, double-view display can be provided.

Description

Display panel, manufacturing method thereof and display device

Technical Field

The invention relates to the field of display, in particular to a display panel, a manufacturing method thereof and a display device.

Background

At present, electronic products with display screens are applied more and more widely in various fields, such as various communication products, vehicle-mounted systems and the like.

However, the conventional display screen can only provide the same display screen for different users, and cannot allow the users to see different images from different angles of the display screen.

Disclosure of Invention

The invention provides a display panel, a manufacturing method thereof and a display device, which can provide double-view display.

In a first aspect, an embodiment of the present invention provides a display panel, including: the display device comprises a display layer, a light source and a light source, wherein the display layer is provided with a light emergent surface and comprises a plurality of first sub-pixels and a plurality of second sub-pixels which are arranged in an array; the light splitting structure is positioned on one side of a light emitting surface of the display layer and comprises a plurality of first light splitting units and a plurality of second light splitting units which are distributed on a plane parallel to the light emitting surface, orthographic projections of the first light splitting units on the display layer are at least partially overlapped with the first sub-pixels, orthographic projections of the second light splitting units on the display layer are at least partially overlapped with the second sub-pixels, at least one of the first light splitting units and the second light splitting units comprises a light modulation structure, the light modulation structure comprises a plurality of sub-structures which are periodically arranged along the plane parallel to the light emitting surface and extend far away from the light emitting surface, and the plurality of sub-structures are provided with a plurality of action surfaces for changing the light emitting direction of incident light of the light modulation structure; the light incident in the first direction corresponding to each first sub-pixel is emitted along the second direction through the first light splitting unit to form a first visual picture, the light incident in the first direction corresponding to each second sub-pixel is emitted along the third direction through the second light splitting unit to form a second visual picture, and the first direction, the second direction and the third direction are different in direction.

In a second aspect, an embodiment of the present invention provides a display device, including any one of the display panels provided according to the embodiments of the present invention.

In a third aspect, an embodiment of the present invention provides a method for manufacturing a display panel, including: providing a display layer, wherein the display layer comprises a light-emitting surface and a plurality of first sub-pixels and a plurality of second sub-pixels which are arranged in an array; and forming a light splitting structure on a light emitting surface of the display layer, wherein the light splitting structure comprises a plurality of first light splitting units and a plurality of second light splitting units which are distributed on a plane parallel to the light emitting surface, orthographic projections of the first light splitting units on the display layer are at least partially overlapped with the first sub-pixels, orthographic projections of the second light splitting units on the display layer are at least partially overlapped with the second sub-pixels, at least one of the first light splitting units and the second light splitting units comprises a light modulation structure, the light modulation structure comprises a plurality of sub-structures which are periodically arranged along the plane parallel to the light emitting surface and extend away from the light emitting surface, and the plurality of sub-structures are provided with a plurality of action surfaces for changing the light emitting direction of the incident light modulation structure.

According to the display panel provided by the embodiment of the invention, the light splitting structure is arranged on one side of the light emitting surface of the display layer, the first light splitting unit and the second light splitting unit of the light splitting structure respectively correspond to the first sub-pixel and the second sub-pixel of the display layer, at least one of the first light splitting unit and the second light splitting unit comprises the light modulation structure, the light modulation structure comprises a plurality of sub-structures which are periodically arranged along a plane parallel to the light emitting surface and extend away from the light emitting surface, and the plurality of sub-structures are provided with a plurality of action surfaces for changing the light emitting direction of incident light of the light modulation structure. At least one of the first light splitting unit and the second light splitting unit comprises a light modulation structure, the acting surface of the light modulation structure can change the propagation direction of light, the direction of the light emitted by the first light splitting unit is different from that of the light emitted by the second light splitting unit, and then double-view-angle display of the display panel is realized.

Drawings

Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.

FIG. 1 shows a top view of a display panel according to an embodiment of the invention;

FIG. 2 shows an enlarged schematic view of region M of FIG. 1;

FIG. 3 shows a schematic cross-sectional view taken along line I-I of FIG. 2;

FIG. 4 illustrates a cross-sectional structural view of one embodiment of the display layer of FIG. 3;

FIG. 5 is a cross-sectional view of one embodiment of a light modulating structure of a display panel according to an embodiment of the invention;

FIG. 6 shows a schematic cross-sectional structure of a first embodiment of the N region of FIG. 3;

FIG. 7 shows a schematic cross-sectional structure of a second embodiment of the N region of FIG. 3;

FIG. 8 is a schematic cross-sectional view of a third embodiment of the N region of FIG. 3;

FIG. 9 is a schematic cross-sectional view of a fourth embodiment of the N region of FIG. 3;

FIG. 10 shows a schematic cross-sectional structure of a fifth embodiment of the N region of FIG. 3;

fig. 11 is a schematic structural view showing an example in which a display panel according to an embodiment of the present invention includes a light shielding layer;

fig. 12 is a schematic structural view showing another example in which a display panel according to an embodiment of the present invention includes a light shielding layer;

FIG. 13 is a schematic cross-sectional view of one embodiment of the N region of FIG. 3 including a light-shielding layer;

FIG. 14 is a schematic cross-sectional view of another embodiment of the N region of FIG. 3 including a light-shielding layer;

fig. 15 to 19 are schematic cross-sectional structure diagrams showing steps in one example of a method of manufacturing a display panel according to an embodiment of the present invention;

fig. 20 to 24 are schematic cross-sectional structure views showing steps in another example of a method of manufacturing a display panel according to an embodiment of the present invention;

fig. 25 to 26 are schematic cross-sectional structure views showing steps in still another example of a method of manufacturing a display panel according to an embodiment of the present invention;

fig. 27 to 30 are schematic cross-sectional structure views showing steps in still another example of a method of manufacturing a display panel according to an embodiment of the present invention.

In the figure:

10-a display panel;

100-a display layer; 101-a first sub-pixel; 102-a second sub-pixel; 110-an array substrate; 130-color film substrate; 1311-color resistance unit; 1312-black matrix; 140-a liquid crystal layer;

200-a light splitting structure; a first light splitting unit 210; 220-a second light splitting unit;

300-a light modulation structure; 301-substructure; 302-an action surface;

310-a first light modulating structure; 311-a first substructure; 312 — a first active surface;

320-a second light modulating structure; 321-a second substructure; 322-a second active side;

400-a light deflecting structure; 401 an incident medium; 402-an exit medium; 403-interface surface;

410-a first light deflecting structure; 411-a first incident medium; 412 — a first exit medium; 413 — a first interface;

420-a second light deflecting structure; 421-a second incident medium; 422-a second exit medium; 423-second interface;

510-a first light-transmitting dielectric layer; 520-a second light-transmitting medium layer; 530-a third light-transmitting dielectric layer 540-a fourth light-transmitting dielectric layer;

900-a light-shielding layer; 910-a first light shield unit; 920-a second light shielding unit;

OA-light emitting surface; x1-a first direction; x2-a second direction; x3-a third direction; y-lateral direction; z-longitudinal direction; a first film layer F1; a second film layer F2; a third film layer F3; a fourth film layer F4; a fifth film layer F5; a sixth film layer F6; a seventh film layer F7; an eighth film layer F8; a ninth film layer F9; the tenth film layer F10.

Detailed Description

Features of various aspects and exemplary embodiments of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising 8230; \8230;" comprises 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.

Referring to fig. 1 to 4 together, fig. 1 illustrates a top view of a display panel according to an embodiment of the present invention, fig. 2 illustrates an enlarged schematic view of an area M in fig. 1, fig. 3 illustrates a cross-sectional structure schematic view of a line I-I in fig. 2, and fig. 4 illustrates a cross-sectional structure schematic view of an embodiment of a display layer in fig. 3.

The embodiment of the invention provides a display panel 10 for realizing dual-view display. As shown in fig. 1, the display panel 10 has a display area AA and a non-display area NA disposed around the display area AA. The Display panel 10 may be a Display panel using a Liquid Crystal Display (LCD), or may be a Display panel using an Organic Light-Emitting Diode (OLED), a Micro-LED (Micro-LED), or the like. The display panel 10 specifically includes a display layer 100 and a light splitting structure 200.

As shown in fig. 3, the display layer 100 has a light emitting surface OA. The display layer 100 includes a plurality of first sub-pixels 101 and a plurality of second sub-pixels 102 arranged in an array. The light emitted by the first sub-pixel 101 of the display layer 100 is emitted toward the first direction X1, and a first initial picture for forming a first visual picture can be formed; and the light emitted from the second sub-pixel 102 of the display layer 100 also exits toward the first direction X1, so that a second initial picture for forming a second visual picture can be formed. Alternatively, the first direction X1 may be perpendicular to the light emitting surface OA of the display layer 100.

The plurality of first sub-pixels 101 include at least three first sub-pixels 101 with different colors, and the plurality of second sub-pixels 102 include at least three second sub-pixels 102 with different colors, so as to realize colorized display of the display panel 10. Specifically, the first sub-pixel 101 includes at least red, green, and blue sub-pixels, for example, a first red sub-pixel, a first green sub-pixel, and a first blue sub-pixel. The second sub-pixel 102 includes at least red, green, and blue sub-pixels, such as a second red sub-pixel, a second green sub-pixel, and a second blue sub-pixel.

As shown in fig. 2, the first sub-pixels 101 and the second sub-pixels 102 may be alternately arranged in sequence along the transverse direction Y in a plane parallel to the light exit plane OA. Further, in the plane, the first sub-pixels 101 may be disposed adjacently and continuously in the longitudinal direction Z, and the second sub-pixels 102 may be disposed adjacently and continuously in the longitudinal direction Z, and the transverse direction Y intersects with the longitudinal direction Z, for example, the transverse direction Y is perpendicular to the longitudinal direction Z. Alternatively, the first sub-pixels 101 and the second sub-pixels 102 may also be alternately arranged in sequence along the longitudinal direction Z. The first sub-pixels 101 and the second sub-pixels 102 are alternately arranged in sequence, so that the first sub-pixels 101 and the second sub-pixels 102 are uniformly distributed on the light emitting surface OA of the display layer 100, and the display size of the light emitting surface OA is better utilized, so that the size of a first visual picture formed by the light emitted by the first sub-pixels 101 and the size of a second visual picture formed by the light emitted by the second sub-pixels 102 are substantially equal to the display size of the light emitting surface OA. And the light emitted by the first sub-pixel 101 and the light emitted by the second sub-pixel 102 are equal in number in the light-emitting surface OA, so as to ensure the uniformity of the display effect of the first visual image and the second visual image.

As shown in fig. 4, in an embodiment that the display panel 10 is a liquid crystal display panel, the display layer 100 may include an array substrate 110, a color filter substrate 130, a liquid crystal layer 140 located between the array substrate 110 and the color filter substrate 130, and a backlight source (not shown) located on a side of the array substrate 110 away from the color filter substrate 130. The color filter substrate 130 may include color resistor units 1311 corresponding to the sub-pixels, and black matrixes 1312 between the adjacent color resistor units 1311. The orthographic projections of the first sub-pixel 101 and the second sub-pixel 102 on the array substrate 110 overlap with the orthographic projection of the color resistance unit 1311 on the array substrate 110. Each sub-pixel realizes colorized display through the color resistance unit 1311 of the color film substrate 130. The color resistance unit 1311 may include a first red color resistance unit R1, a first green color resistance unit G1, and a first blue color resistance unit B1 respectively disposed corresponding to the first red subpixel, the first green subpixel, and the first blue subpixel, and a second red color resistance unit R2, a second green color resistance unit G2, and a second blue color resistance unit B2 respectively disposed corresponding to the second red subpixel, the second green subpixel, and the second blue subpixel.

As shown in fig. 3, the light splitting structure 200 is located at the light-emitting surface OA side of the display layer 100. Specifically, the light splitting structure 200 may be attached to the light emitting surface OA of the display layer 100, for example, the light splitting structure 200 may be adhered to the light emitting surface OA of the display layer 100 by using an optical adhesive. The light splitting structure 200 includes a plurality of first light splitting units 210 and a plurality of second light splitting units 220 distributed on a plane parallel to the light exit plane OA of the display layer 100. The orthographic projection of the first light splitting unit 210 on the display layer 100 at least partially coincides with the first sub-pixel 101, and the orthographic projection of the second light splitting unit 220 on the display layer 100 at least partially coincides with the second sub-pixel 102. The first light splitting units 210 and the second light splitting units 220 are alternately arranged in sequence in a plane parallel to the light exit surface OA of the display layer 100. The first and second

light splitting units

210 and 220 are arranged in the same manner as the first and second sub-pixels 101 and 102.

Referring to fig. 5, fig. 5 is a schematic cross-sectional view illustrating an embodiment of a light modulation structure of a display panel according to the invention.

At least one of the first light splitting unit 210 and the second light splitting unit 220 includes a light modulation structure 300, the light modulation structure 300 includes a plurality of sub-structures 301 periodically arranged along a plane parallel to the light exit surface OA and extending away from the light exit surface OA, and the plurality of sub-structures 301 have a plurality of active surfaces 302 for changing the light exiting direction of the light incident on the light modulation structure 300. Illustratively, as shown in fig. 5, a light ray incident in the direction P1 changes to propagate toward the direction P2 at the action surface 302. When a light ray is incident on the active surface 302 at an angle, the light ray is reflected or diffracted at the active surface 302 to change the propagation direction of the light ray.

Specifically, the light modulation structure 300 is at least one of a volume grating and a reflective array structure.

In the embodiment where the light modulating structure 300 is a volume grating, as shown in fig. 5, the refractive index of the light modulating structure 300 varies periodically. The substructure 301 represents a periodic structure in a volume grating. The active surface 302 represents the interface of adjacent periods, and when the volume grating is a bragg diffractive crystal, the active surface 302 may represent a planar cluster of crystal planes. d represents lightThe period of the grid, i.e. the vertical spacing, θ, between two adjacent active surfaces 302 ₁ Representing the Bragg angle, theta, of the volume grating ₂ Indicating the exit angle of the diffracted light of the volume grating. Bragg angle theta ₁ Satisfies 2d sin (theta) ₁ ) = j λ (j =1,2,3 \ 8230; where λ is the wavelength of light incident into the bulk grating).

The volume grating may be made of one or more of silver halide, dichromated gelatin, photopolymer, photoresist, photoconductive thermoplastic, photorefractive crystal.

In embodiments where the light modulating structure 300 is a reflective array structure, the active surface 302 may have a high reflectivity for visible light, and may be, for example, a multilayer dielectric film disposed in a transparent substrate. Specifically, each of the sub-structures 301 may be individually disposed, and a dielectric film is disposed between two adjacent sub-structures 301 to form an active surface 302 for reflecting. Wherein, the dielectric film can be replaced by a reflecting lens.

The light incident in the first direction X1 corresponding to each first sub-pixel 101 is emitted along the second direction X2 through the first light splitting unit 210 to form a first visual image. The light incident in the first direction X1 corresponding to each second sub-pixel 102 is emitted along the third direction X3 through the second light splitting unit 220 to form a second visual image. The first direction X1, the second direction X2, and the third direction X3 are different from each other. Optionally, the second direction X2 and the third direction X3 are deflected in opposite directions relative to the first direction X1.

According to the display panel 10 of the embodiment of the invention, by disposing the light splitting structure 200 on the side of the light exit surface OA of the display layer 100, the first light splitting unit 210 and the second light splitting unit 220 of the light splitting structure 200 respectively correspond to the first sub-pixel 101 and the second sub-pixel 102 of the display layer 100, at least one of the first light splitting unit 210 and the second light splitting unit 220 includes the light modulation structure 300, the light modulation structure 300 includes a plurality of sub-structures 301 periodically arranged along a plane parallel to the light exit surface OA and extending along the direction away from the light exit surface OA, and the plurality of sub-structures 301 have a plurality of active surfaces 302 for changing the light exit direction of the incident light modulation structure 300. At least one of the first light splitting unit 210 and the second light splitting unit 220 includes the light modulation structure 300, and the active surface 302 of the substructure 301 in the light modulation structure 300 can change the propagation direction of light, so that the direction of light emitted from the first light splitting unit 210 is different from that of light emitted from the second light splitting unit 220, thereby implementing dual-view display of the display panel 10.

Referring to fig. 6, fig. 6 is a schematic cross-sectional view of a first embodiment of the N region in fig. 3.

Further, one of the first light splitting unit 210 and the second light splitting unit 220 includes the light modulating structure 300, and at least one of the first light splitting unit 210 and the second light splitting unit 220 includes the light deflecting structure 400. Both the light modulating structure 300 and the light deflecting structure 400 can change the propagation direction of light.

Specifically, the light deflecting structure 400 includes an incident medium 401 and an exit medium 402 having different refractive indices. The entrance medium 401 and the exit medium 402 are both light-transmitting media. The incident medium 401 and the exit medium 402 are sequentially disposed in a direction perpendicular to the exit surface OA and define an interface 403 disposed at an acute angle with the exit surface OA, and the interface 403 changes an exit direction of light incident to the light deflecting structure 400. The incident medium 401 may form a protrusion facing away from the light output surface OA, and the exit medium 402 may form a protrusion facing the light output surface OA to match and contact the incident medium 401 to form the interface 403. The incident medium 401 has a surface facing and parallel to the light exit surface OA. The exit medium 402 has a surface facing away from and parallel to the exit surface OA. When the first direction X1 is perpendicular to the light emitting surface OA, the light is incident to the incident medium 401 along the first direction X1 without changing the direction. When the light reaches the intersection 403, since the interface 403 is disposed at an angle with respect to the light-emitting surface OA, that is, the first direction X1 is not perpendicular to and parallel to the light-emitting surface OA, and the refractive indexes of the incident medium 401 and the exit medium 402 on both sides of the light-emitting surface OA are different, the light is refracted from the incident medium 401 to the exit medium 402 via the interface 403 and deflected, that is, the propagation direction of the light in the exit medium 402 is different from the propagation direction in the incident medium 401 (for example, the first direction X1). Since the surface of the exit medium 402 facing away from the exit surface OA is parallel to the exit surface OA, i.e. perpendicular to the first direction X1, and the propagation direction of the light beam in the exit medium 402 is different from the first direction X1, when the refractive index of the exit medium 402 is different from the refractive index of the medium facing away from the incident medium 401 and adjacent to the exit medium 402, the light beam exits from the exit medium 402 and is refracted, and the propagation direction of the light beam is deflected.

Alternatively, the refractive index of the entrance medium 401 may be larger than the refractive index of the exit medium 402, and the refractive index of the exit medium 402 may be larger than the refractive index of a medium adjoining the exit medium 402 facing away from the entrance medium 401. In this embodiment, the incident angle of the light beam when the light beam is refracted for the first time through the interface 403 is smaller than the exit angle, and the incident angle of the light beam when the light beam is refracted for the second time through the surface of the exit medium 402 facing away from the exit surface OA is also smaller than the exit angle, and the light beam is deflected along the same side when the light beam is refracted for two times, so that the light beam emitted by the first sub-pixel 101 or the second sub-pixel 102 corresponding to the light beam deflecting structure 400 along the first direction X1 is deflected and exits along a direction different from the first direction X1 after passing through the light beam deflecting structure 400.

The angle of incidence of the light at the interface 403, the refractive index of the entrance medium 401, and the refractive index of the exit medium 402 may be selected to avoid total reflection of the light at the interface 403. The incident angle of the light exiting from the exit medium 402, the refractive index of the exit medium 402, and the refractive index of the medium adjacent to the exit medium 402 facing away from the entrance medium 401 may also be selected to avoid total reflection of the light exiting from the exit medium 402.

The medium facing away from the entrance medium 401 adjacent to the exit medium 402 may be air, a planarization layer, or other film layer.

Specifically, the incident medium 401 is a right-angle prism, the right-angle prism includes two perpendicular-to-perpendicular right-angle surfaces and an inclined surface connecting the two perpendicular-to-perpendicular right-angle surfaces, one of the two perpendicular-to-perpendicular right-angle surfaces is parallel to the light emitting surface OA and the other perpendicular to the light emitting surface OA, and the inclined surface is an interface 403. The material of the incident medium 401 may be a light-transmitting organic material, such as polyimide, polycarbonate, or polymethyl methacrylate. In other embodiments, the material of the incident medium 401 may be a transparent inorganic material, such as silicon oxide, silicon nitride, etc. The outgoing medium 402 may also be a right-angle prism structure and has two perpendicular surfaces and an inclined surface connecting the two perpendicular surfaces, wherein one perpendicular surface is parallel to the outgoing surface OA and the other perpendicular surface is perpendicular to the outgoing surface OA, and the inclined surface of the outgoing medium 402 contacts with the inclined surface of the incident medium 401 to form an interface 403. The material of the emission medium 402 may be a light-transmitting organic material, such as polyimide, polycarbonate, or polymethyl methacrylate. The exit medium 402 may be a planarized layer of the entrance medium 401 facing away from the light exit plane OA side. In other embodiments, the material of the exit medium 402 may be a transparent inorganic material, such as silicon oxide, silicon nitride, etc.

Referring to fig. 6, in some embodiments, the first light splitting unit 210 includes a light modulation structure 300, and the second light splitting unit 220 includes a light deflection structure 400, the light modulation structure 300 and the light deflection structure 400 are disposed in the same layer, and the active surface 302 of the light modulation structure 300 and the light emitting surface OA are disposed at an acute angle. The light modulating structure 300 in the first light splitting unit 210 is configured to deflect the propagation direction of the light emitted from the first sub-pixel 101 and emit the light along the second direction X2, and the light deflecting structure 400 in the second light splitting unit 220 is configured to deflect the propagation direction of the light emitted from the second sub-pixel 102 and emit the light along the third direction X3.

In some alternative embodiments, the refractive index of the entrance medium 401 of the light deflecting structure 400 is greater than the refractive index of the exit medium 402. Moreover, the interface 403 of the light deflecting structure 400 is disposed at an acute angle with the light emitting surface OA. In some examples, as shown in fig. 6, a plane where the interface 403 is located intersects the light exit surface OA as a reference straight line, and an included angle between a portion of the light exit surface OA located on the reference straight line and facing the transverse direction Y and the interface 403 is an acute angle α. The light emitted by the second sub-pixel 102 in the first direction X1 is refracted at the interface 403 and tilted towards the transverse direction Y. When the refractive index of the exit medium 402 is larger than that of the medium adjacent to the exit medium 402 away from the incident medium 401, the light continues to be inclined toward the transverse direction Y when exiting the exit medium 402, and exits along the third direction X3 as shown in fig. 6.

The inclination of the interface 403 with respect to the light exit surface OA and the inclination of the active surface 302 with respect to the light exit surface OA are acute and obtuse, respectively. That is, the inclination directions of the interface 403 and the acting surface 302 with respect to the light output surface OA are opposite, and when the interface 403 is inclined in the transverse direction Y with respect to the light output surface OA, the acting surface 302 is inclined in the transverse direction Y away from the light output surface OA. Specifically, an obtuse angle β is formed between each active surface 302 of the light modulation structure 300 and the light emitting surface OA. The light emitted by the first subpixel 101 in the first direction X1 is reflected or bragg diffracted at the active surface 302 and is inclined away from the transverse direction Y. When the refractive index of the light modulating structure 300 is greater than the refractive index of the medium adjacent to the light modulating structure 300 facing away from the display layer 100, the light rays continue to be inclined away from the transverse direction Y when exiting the light modulating structure 300, and exit along the second direction X2 as shown in fig. 6.

It should be noted that, in this document, the second direction X2 and the third direction X3 do not represent specific directions in space, but represent a direction relationship between the second direction X2 and the third direction X3 in each embodiment. In different embodiments, the specific directions represented in space by the second directions X2 may be different, and the specific directions represented in space by the third directions X3 may be different.

Referring to fig. 7, fig. 7 is a schematic cross-sectional view of a second embodiment of the N region in fig. 3.

In other embodiments, the first light splitting unit 210 includes a light modulation structure 300 and a first light deflecting structure 410, the second light splitting unit 220 includes a second light deflecting structure 420, the first light deflecting structure 410 and the second light deflecting structure 420 are disposed in the same layer, and the light modulation structure 300 is located on a side of the first light deflecting structure 410 opposite to the light emitting surface OA. The light modulating structure 300 and the first light deflecting structure 410 in the first light splitting unit 210 are used for deflecting the propagation direction of the light emitted from the first sub-pixel 101 and emitting the light in the second direction X2, and the first light deflecting structure 410 in the second light splitting unit 220 is used for deflecting the propagation direction of the light emitted from the second sub-pixel 102 and emitting the light in the second direction X2.

Optionally, the light modulation structure 300 and the first light deflection structure 410 are completely overlapped in the orthographic projection of the display layer 100, so that the light modulation structure 300 and the first light deflection structure 410 are precisely aligned in the direction perpendicular to the light exit surface OA. The light modulation structure 300 is prevented from reversely deflecting the light emitted from the adjacent second light deflection structure 420 to generate color crosstalk, so that the dual-view display effect of the display panel 10 is improved.

Further, the orthographic projection of the first light deflecting structure 410 on the display layer 100 completely coincides with the first sub-pixel 101, and/or the orthographic projection of the second light deflecting structure 420 on the display layer 100 completely coincides with the second sub-pixel 102. The first light deflecting structure 410 is precisely aligned with the first sub-pixel 101, and the second light deflecting structure 420 is precisely aligned with the second sub-pixel 102, so that color crosstalk between adjacent pixels can be reduced, and the display effect can be enhanced.

Specifically, the first light deflecting structure 410 includes a first incident medium 411 and a first exit medium 412, and a first interface 413 located between the first incident medium 411 and the first exit medium 412, and a refractive index of the first incident medium 411 is greater than a refractive index of the first exit medium 412. In some examples, as shown in fig. 7, the plane of the interface 413 intersects the light-emitting surface OA as a reference line, and an included angle between a portion of the light-emitting surface OA located on the reference line and facing the transverse direction Y and the interface 413 is an acute angle α ₁ . The light emitted from the first sub-pixel 101 in the first direction X1 is refracted at the interface 413 and tilted towards the transverse direction Y. The refractive index of the light modulating structure 300 is optionally equal to the refractive index of the first exit medium 412, and light is incident on the light modulating structure 300 from the first exit medium 412 without deflection. The active surface 302 of the light modulating structure 300 is perpendicular to the light emitting surface OA. The light beam enters the light modulation structure 300 and forms an included angle with the action surface 302, and the light beam is reflected or bragg diffracted at the action surface 302 and inclines back to the transverse direction Y. When the refractive index of the light modulating structure 300 is greater than the refractive index of the medium adjacent to the light modulating structure 300 facing away from the display layer 100, the light rays continue to incline away from the transverse direction Y when exiting the light modulating structure 300, and exit along the second direction X2 as shown in fig. 7.

The second light deflecting structure 420 includes a second incident medium 421 and a second emergent medium 422,And a second interface 423 between the second entrance medium 421 and the second exit medium 422, the refractive index of the second entrance medium 421 being greater than the refractive index of the second exit medium 422. The inclination angle of the first interface 413 with respect to the light exit plane OA and the inclination angle of the second interface 423 with respect to the light exit plane OA are both acute angles or both obtuse angles. Illustratively, the first interface 413 and the second interface 423 are both inclined towards the transverse direction Y. In some examples, as shown in fig. 7, the plane of the interface 423 intersects the light-emitting surface OA as a reference line, and an included angle between a portion of the light-emitting surface OA located on the reference line and facing the transverse direction Y and the interface 423 is an acute angle α ₂ . The light emitted by the second sub-pixel 102 in the first direction X1 is refracted at the interface 423 and tilted towards the transverse direction Y. When the refractive index of the exit medium 422 is greater than the refractive index of the medium adjacent to the exit medium 422 away from the incident medium 421, the light continues to be inclined toward the transverse direction Y when exiting the exit medium 422, and exits along the third direction X3 as shown in fig. 7.

Optionally, the first interface 413 is parallel to the second interface 423, the angle α ₁ Equal to angle alpha ₂ . Further, the first incident medium 411 and the second incident medium 421 are disposed on the same film layer and have the same refractive index, and the first exiting medium 412 and the second exiting medium 422 are disposed on the same film layer and have the same refractive index. The exit angle refracted at the first interface 413 by the light ray emitted from the first subpixel 101 in the first direction X1 is equal to the exit angle refracted at the second interface 423 by the light ray emitted from the second subpixel 102 in the first direction X1, and the propagation direction of the light ray from the first subpixel 101 in the first exit medium 412 is the same as the propagation direction of the light ray from the second subpixel 102 in the second exit medium 422. In the embodiment where the refractive index of the light modulating structure 300 is equal to the refractive index of the first exit medium 412, the light is incident from the first exit medium 412 to the light modulating structure 300 without a change in the propagation direction. The active surface 302 of the light modulation structure 300 is perpendicular to the light exit surface OA, and the tilt angle of the propagation direction of the light reflected or bragg diffracted at the active surface 302 with respect to the light exit surface OA is complementary to the tilt angle of the propagation direction of the light in the second exit medium 422 with respect to the light exit surface OA, the light being emitted from the light exit medium OAThe angle of incidence of the light exiting the light modulating structure 300 is equal to the angle of incidence of the light exiting the second exit medium 422. When the refractive index of the medium adjacent to the exit medium 422 away from the incident medium 421 is equal to the refractive index of the medium adjacent to the light modulation structure 300 away from the display layer 100, the exit angle of the light from the light modulation structure 300 is equal to the exit angle of the light from the second exit medium 422, and the tilt angles of the second direction X2 and the third direction X3 with respect to the light exit surface OA are complementary. The viewing angles of the two visual images displayed by the display panel 10 for displaying two viewing angles according to the embodiment of the present invention are symmetrically arranged.

Referring to fig. 8, fig. 8 is a schematic cross-sectional view illustrating a third embodiment of the N region in fig. 3.

In some alternative embodiments, the display panel 10 further includes a first light-transmissive medium layer 510 and a second light-transmissive medium layer 520.

The first light-transmitting medium layer 510 is disposed on the side of the first light deflecting structure 410 and the second light deflecting structure 420 opposite to the light-emitting surface OA, and is sandwiched between the light modulating structure 300 and the first light deflecting structure 410. The first light-transmitting medium layer 510 has two opposite surfaces parallel to the light-emitting surface OA, one of the surfaces is attached to the first light-deflecting structure 410 and the second light-deflecting structure 420, and the other surface is attached to the light-modulating structure 300. The first light-transmitting medium layer 510 may be a substrate. The material of the first light-transmitting medium layer 510 may be a light-transmitting organic material, such as polyimide, polycarbonate, polymethyl methacrylate, etc.; or may be a light-transmissive inorganic material such as silicon oxide, silicon nitride, or the like.

The refractive index of the first light-transmitting medium layer 510 may be greater than or equal to the refractive indices of the first exit medium 412 and the second exit medium 422, and the refractive index of the first light-transmitting medium layer 510 is equal to the refractive index of the light modulation structure 300. In other embodiments, the refractive index of the first light-transmitting medium layer 510 may also be smaller than the refractive indices of the first and

second exit media

412 and 422, but the relationship between the refractive index of the first light-transmitting medium layer 510 and the refractive indices of the first and

second exit media

412 and 422 is such that the light rays do not undergo total reflection between the first light-transmitting medium layer 510 and the first and

second exit media

412 and 422.

The second transparent dielectric layer 520 covers the light modulation structure 300 and the first transparent dielectric layer 510 away from the light emitting surface OA. The second light-transmitting medium layer 520 may be a planarization layer. The material of the second light-transmitting dielectric layer 520 may be a light-transmitting organic material, such as polyimide, polycarbonate, polymethyl methacrylate, etc. The refractive index of the second light-transmissive dielectric layer 520 is greater than or equal to the refractive index of the first light-transmissive dielectric layer 510. In other embodiments, the refractive index of the second light-transmissive medium layer 520 may be smaller than the refractive index of the first light-transmissive medium layer 510, but the relationship between the refractive index of the second light-transmissive medium layer 520 and the refractive index of the first light-transmissive medium layer 510 is such that the light is not totally reflected between the second light-transmissive medium layer 520 and the first light-transmissive medium layer 510.

In some alternative embodiments, the refractive index of the medium on the side of the second light-transmitting medium layer 520 facing away from the first light-transmitting medium layer 510 is smaller than the refractive index of the second light-transmitting medium layer 520, and the medium on the side of the second light-transmitting medium layer 520 facing away from the first light-transmitting medium layer 510 may be, for example, air or other optical film layer.

The first transparent medium layer 510 and the second transparent medium layer 520 are disposed, and when light is refracted in the first transparent medium layer 510 and/or the second transparent medium layer 520, the viewing angle deflection amplitude can be changed through refraction, so as to further improve the viewing angle.

In some alternative embodiments, the plurality of first sub-pixels 101 includes at least three first sub-pixels 101 of different colors, and the refractive indexes of the first incident mediums 411 corresponding to the first sub-pixels 101 of different colors and/or the refractive indexes of the first exit mediums 412 corresponding to different colors are different, or the inclination angles of the first interfaces 413 of the first sub-pixels 101 corresponding to different colors with respect to the light exit surface OA are different. The refractive index of the first incident medium 411, the refractive index of the first exit medium 412, and the inclination angle of the first interface 413 with respect to the light exit surface OA of the first light splitting unit 210 of the first sub-pixel 101 corresponding to different colors can be adjusted, so that the directions of the light rays emitted by the first sub-pixel 101 corresponding to different colors and having different colors after passing through the first light splitting unit 210 are the same.

The plurality of second sub-pixels 102 includes at least three second sub-pixels 102 of different colors, and the refractive indexes of the second incident mediums 421 corresponding to the second sub-pixels 102 of different colors are different and/or the refractive indexes of the second exit mediums 422 corresponding to different colors are different, or the inclination angles of the second interface 423 corresponding to the second sub-pixels 102 of different colors with respect to the light exit plane OA are different. The refractive index of the second incident medium 421, the refractive index of the second exit medium 422, and the inclination angle of the second interface 423 with respect to the light exit surface OA of the second light splitting unit 220 of the second sub-pixel 102 corresponding to different colors can be adjusted, so that the directions of the light rays emitted by the second sub-pixel 102 corresponding to different colors and having different colors after passing through the second light splitting unit 220 are the same.

Referring to fig. 9, fig. 9 is a schematic cross-sectional view illustrating a fourth embodiment of the N region in fig. 3.

In other embodiments, the first light splitting unit 210 includes a first light modulating structure 310 and the second light splitting unit 220 includes a second light modulating structure 320. The first light modulation structure 310 and the second light modulation structure 320 are disposed in the same layer.

The first light modulation structure 310 includes a plurality of first sub-structures 311, and the plurality of first sub-structures 311 have a plurality of first active surfaces 312 for changing the emitting direction of the light incident on the first light modulation structure 310. The second light modulating structure 320 includes a plurality of second sub-structures 321, and the plurality of second sub-structures 321 have a plurality of second active surfaces 322 for changing the emitting direction of the light incident on the second light modulating structure 320. One of the inclination angle of the first active surface 312 with respect to the light output surface OA and the inclination angle of the second active surface 322 with respect to the light output surface OA is acute and the other is obtuse. That is, the first active surface 312 and the second active surface 322 are inclined in opposite directions with respect to the light output surface OA. Alternatively, the inclination angle of the first active surface 312 with respect to the light exit surface OA and the inclination angle of the second active surface 322 with respect to the light exit surface OA are complementary angles.

Specifically, an obtuse angle β is formed between each first active surface 312 of the first light modulation structure 310 and the light emitting surface OA ₁ . The first sub-pixel 101 emitsIs reflected or bragg diffracted at the first active surface 312 obliquely away from the transverse direction Y. When the refractive index of the first light modulating structure 310 is greater than the refractive index of the medium adjacent to the first light modulating structure 310 facing away from the display layer 100, the light continuously inclines away from the transverse direction Y when exiting the first light modulating structure 310, and exits along the second direction X2 as shown in fig. 9. An obtuse angle β is formed between each second active surface 322 of the second light modulation structure 320 and the light-emitting surface OA ₂ . The light emitted from the second sub-pixel 102 in the first direction X1 is reflected or bragg diffracted at the second active surface 322 and is inclined toward the transverse direction Y. When the refractive index of the second light modulation structure 320 is greater than the refractive index of the medium adjacent to the second light modulation structure 320 and facing away from the display layer 100, the light continuously inclines towards the transverse direction Y when exiting the second light modulation structure 320, and exits along the third direction X3 as shown in fig. 9.

When the inclination angle of the first active surface 312 relative to the light emitting surface OA and the inclination angle of the second active surface 322 relative to the light emitting surface OA are complementary angles, the display panel 10 for dual-view display according to the embodiment of the present invention is symmetrically disposed along the viewing angles of the two visual images respectively displayed in the second direction X2 and the third direction X3.

Referring to fig. 10, fig. 10 shows a schematic cross-sectional structure diagram of a fifth embodiment of the N region in fig. 3.

In some alternative embodiments, the display panel 10 further includes a third light-transmissive medium layer 530 and a fourth light-transmissive medium layer 540.

The third light-transmitting medium layer 530 is sandwiched between the display layer 100 and the first and second

light modulation structures

310 and 320. The third light-transmitting medium layer 530 may be a substrate, for example, a glass substrate. The third transparent dielectric layer 530 may be made of a transparent organic material, such as polyimide, polycarbonate, or polymethyl methacrylate; or may be a light-transmissive inorganic material such as silicon oxide, silicon nitride, or the like.

The fourth light-transmitting medium layer 540 is located on the side of the first light modulation structure 310 and the second light modulation structure 320 opposite to the third light-transmitting medium layer 530. The fourth light-transmitting medium layer 540 may be a planarization layer. The material of the fourth light-transmitting medium layer 540 may be a light-transmitting organic material, such as polyimide, polycarbonate, polymethyl methacrylate, etc.

The third light-transmitting medium layer 530 may have a refractive index equal to that of the first light modulation structure 310 and the second light modulation structure 320, and the refractive index of the fourth light-transmitting medium layer 540 is greater than or equal to that of the third light-transmitting medium layer 530. In other embodiments, the refractive index of the fourth light-transmissive medium layer 540 may also be smaller than that of the third light-transmissive medium layer 530.

The refractive index of the medium of the fourth light-transmissive medium layer 540 on the side facing away from the third light-transmissive medium layer 530 may be smaller than the refractive index of the fourth light-transmissive medium layer 540. The medium on the side of the fourth light-transmitting medium layer 540 facing away from the third light-transmitting medium layer 530 may be air or other optical film layer.

The refractive index of the third transparent medium layer 530, the refractive index of the fourth transparent medium layer 540, and the refractive index of the medium on the side of the fourth transparent medium layer 540 opposite to the third transparent medium layer 530 are required to satisfy that the light is not totally reflected on the surface of the fourth transparent medium layer 540 facing the third transparent medium layer 530 and the surface of the fourth transparent medium layer 540 opposite to the third transparent medium layer 530.

The third transparent medium layer 530 and the fourth transparent medium layer 540 are disposed, and when light is refracted in the third transparent medium layer 530 and/or the fourth transparent medium layer 540, the viewing angle deflection amplitude can be changed through refraction, so as to further improve the viewing angle.

Referring to fig. 11 and 12, fig. 11 is a schematic structural diagram illustrating an example in which a display panel according to an embodiment of the present invention includes a light-shielding layer, and fig. 12 is a schematic structural diagram illustrating another example in which a display panel according to an embodiment of the present invention includes a light-shielding layer.

In some optional embodiments, the display panel 10 further includes a light-shielding layer 900, and the light-shielding layer 900 is sandwiched between the display layer 100 and the light splitting structure 200, or is located in the display layer 100. The light-shielding layer 900 may be a light-absorbing material layer such as black glue or black ink, or may be a light-reflecting material layer such as a metal layer. The light-shielding layer 900 may be a separately provided layer interposed between the display layer 100 and the light splitting structure 200. In other embodiments, the black matrix in the color filter substrate of the liquid crystal display panel may be multiplexed as the light-shielding layer 900.

In some embodiments, the width of the light-shielding layer 900 between the adjacent first sub-pixels 101 and the adjacent second sub-pixels 102 is greater than the width of the light-shielding layer 900 between the adjacent first sub-pixels 101 and the light-shielding layer 900 between the adjacent second sub-pixels 102. Further, the widths of the light-shielding layers 900 between the adjacent first sub-pixel 101 and the second sub-pixel 102 may be different, for example, in the transverse direction Y, the light-shielding layers 900 having the first width and the light-shielding layers having the second width are alternately disposed, and the first width is greater than the second width.

In other embodiments, the sub-pixels are staggered in the longitudinal direction Z, and the width of the light-shielding layer 900 between adjacent sub-pixels along the transverse direction Y is greater than the width of the light-shielding layer 900 between adjacent sub-pixels along the longitudinal direction Z.

The light-shielding layer 900 includes a first light-shielding unit 910 disposed corresponding to the first sub-pixel 101 and a second light-shielding unit 920 disposed corresponding to the second sub-pixel 102, and in a direction perpendicular to the light-emitting surface OA, orthographic projections of the first light-shielding unit 910 and the first light-splitting unit 210 on the light-emitting surface OA are at least partially overlapped, and orthographic projections of the second light-shielding unit 920 and the second light-splitting unit 220 on the light-emitting surface OA are at least partially overlapped. The first light shielding unit 910 and the second light shielding unit 920 are disposed to prevent light emitted from the first sub-pixel 10 from entering the second light splitting unit 220 and light emitted from the second sub-pixel 102 from entering the first light splitting unit 210.

Referring to fig. 13 and 14 together, fig. 13 is a schematic cross-sectional structure diagram of an embodiment of the N region in fig. 3 including a light-shielding layer, and fig. 14 is a schematic cross-sectional structure diagram of another embodiment of the N region in fig. 3 including a light-shielding layer.

As shown in fig. 13, in an embodiment where the first light splitting unit 210 includes the light modulation structure 300 and the first light deflecting structure 410, and the second light splitting unit 220 includes the second light deflecting structure 420, in a direction perpendicular to the light exit surface OA, a width of an overlapping portion of orthographic projections of the first light shielding unit 910 and the first light splitting unit 210 on the light exit surface OA is b, and a width of an overlapping portion of orthographic projections of the second light shielding unit 920 and the second light splitting unit 220 on the light exit surface OA is a.

Specifically, L is a thickness of the first transparent dielectric layer 510 in a direction perpendicular to the light exit surface OA, D is a thickness of the light modulation structure 300 in a direction perpendicular to the light exit surface OA, and H is a vertical distance between a position where a propagation direction of the light ray in the light modulation structure 300 changes and a surface of the light modulation structure 300 facing the first transparent dielectric layer 510.

When the refractive index of the first transparent medium layer 510, the refractive index of the second transparent medium layer 520, the refractive index of the first exit medium 412, and the refractive index of the second exit medium 422 are equal, and the refractive index of the first incident medium 411 is equal to the refractive index of the second incident medium 421, tan (θ) is satisfied ₃ )＝a/(L+D+a*tan(α ₂ ))，tan(θ ₄ )＝b/(L+H+b*tan(α ₁ ) When α) is ₂ ＝α ₁ And b is less than a since H is less than D. That is, the width b of the overlapping portion of the orthographic projection of the first light shielding unit 910 and the orthographic projection of the first light splitting unit 210 on the light exit surface OA is smaller than the width a of the overlapping portion of the orthographic projection of the second light shielding unit 920 and the orthographic projection of the second light splitting unit 220 on the light exit surface OA.

As shown in fig. 14, in the embodiment where the first light splitting unit 210 includes the first light modulation structure 310 and the second light splitting unit 220 includes the second light modulation structure 320, the first light shielding unit 910 disposed corresponding to the first sub-pixel 101 may be located on a side of the first sub-pixel 101 facing the transverse direction Y, and the second light shielding unit 920 disposed corresponding to the second sub-pixel 102 may be located on a side of the second sub-pixel 102 facing away from the transverse direction Y. The first light shielding unit 910 and the second light shielding unit 920 adjacently disposed may be abutted or integrally connected. Thus, the manufacturing process of the light shielding unit 900 can be simplified.

In some optional embodiments, the display panel 10 further includes a polarizer (not shown), and the polarizer is sandwiched between the display layer 100 and the light splitting structure 200. The light passes through the polarizer and then is divided into lights in different directions by the light splitting structure 200 to be emitted, so that the selective action of the polarizer on the lights in different directions can be avoided, and the dual-view display can be realized.

The embodiment of the invention also provides a display device which comprises any one of the display panels provided by the embodiment of the invention and has similar beneficial effects with the display panel provided by the embodiment of the invention.

The embodiment of the invention also provides a manufacturing method of the display panel, which comprises the following steps:

s100: a display layer 100 is provided, and the display layer 100 includes a plurality of first sub-pixels 101 and a plurality of second sub-pixels 102 arranged in an array having an exit surface OA.

S200: the light-splitting structure 200 is formed on the light-emitting surface OA of the display layer 100.

The light splitting structure 200 includes a plurality of first light splitting units 210 and a plurality of second light splitting units 220 distributed on a plane parallel to the light exit plane OA, an orthographic projection of the first light splitting unit 210 on the display layer 100 at least partially coincides with the first sub-pixel 101, an orthographic projection of the second light splitting unit 220 on the display layer 100 at least partially coincides with the second sub-pixel 102, at least one of the first light splitting unit 210 and the second light splitting unit 220 includes a light modulation structure 300, the light modulation structure 300 includes a plurality of sub-structures 301 periodically arranged along the plane parallel to the light exit plane OA and extending away from the light exit plane OA, and the plurality of sub-structures 301 have a plurality of active surfaces 302 for changing the light exit direction of the incident light modulation structure 300.

Fig. 15 to 19 are schematic cross-sectional structure views showing steps in one example of a method of manufacturing a display panel according to an embodiment of the present invention.

In some embodiments, the step S200 of forming the light splitting structure 200 on the light emitting surface OA of the display layer 100 includes:

s211: as shown in fig. 15, a first film F1 is formed on the light emitting surface OA of the display layer 100. The first film layer F1 may be a light-transmissive organic material, such as polyimide, polycarbonate, polymethyl methacrylate, or the like. The first film layer F1 may be formed on the light emitting surface OA of the display layer 100 by a coating method, such as a slit coating method, a spin coating method, a spray coating method, a roll coating method, or a bar coating method.

S212: as shown in fig. 16, an etching or imprinting process is performed on a surface of the first film F1 opposite to the display layer 100 to form a first incident medium 411 corresponding to the first sub-pixel 101 and a second incident medium 421 corresponding to the second sub-pixel 102.

Specifically, a wet etching process or a dry etching process may be used to etch the surface of the first film F1 facing away from the display layer 100, or a mold having an inclined plane arranged in an array may be used to imprint the surface of the first film F1 facing away from the display layer 100, so that the first film F1 facing away from the display layer 100 forms a plurality of right-angle prism structures arranged in an array.

S213: as shown in fig. 17, a second film F2 is formed on the surfaces of the first incident medium 411 and the second incident medium 421 opposite to the display layer 100, so as to form a first exit medium 412 corresponding to the first sub-pixel 101 and a second exit medium 422 corresponding to the second sub-pixel 102.

The second film layer F2 may be a planarization layer. The second film layer F2 may be a light-transmissive organic material, such as polyimide, polycarbonate, polymethyl methacrylate, or the like. The second film layer F2 may be formed by a coating method, and may be, for example, a slit coating method, a spin coating method, a spray coating method, a roll coating method, or a bar coating method. The second film layer F2 may be made of a material having a refractive index different from that of the first film layer F1, for example, the refractive index of the second film layer F2 is smaller than that of the first film layer F1.

S214: as shown in fig. 18, a third film layer F3 is disposed on a side of the first exit medium 412 facing away from the display layer 100.

Specifically, a coating process may be employed to form the third film layer F3 on the first and

second exit media

412 and 422. The third film layer F3 may include one or more of silver halide, dichromated gelatin, photopolymer, photoresist, photoconductive thermoplastic, photorefractive crystal.

And, the patterned third film layer F3 corresponding to the second exit medium 422 may be formed through an etching process.

S215: as shown in fig. 19, the third film layer F3 is crystallized to form a light modulation structure 300.

Specifically, the crystallization treatment may be performed by a method such as light irradiation or heating.

Fig. 20 to 24 are schematic cross-sectional structure views showing steps in another example of a method of manufacturing a display panel according to an embodiment of the present invention.

In other specific embodiments, the step S200 of forming the light splitting structure 200 on the light emitting surface OA of the display layer 100 includes:

s220: forming the light splitting structure 200.

Step S220 may specifically include:

s221: as shown in fig. 20, a first light-transmitting medium layer 510 is provided, and the first light-transmitting medium layer 510 includes a plurality of first regions A1 and a plurality of second regions A2 arranged in an array.

The first light-transmitting medium layer 510 may serve as a substrate. The first light-transmitting dielectric layer 510 may be an organic material or an inorganic material. The first light-transmitting dielectric layer 510 may be a glass substrate.

S222: as shown in fig. 20, a fourth film F4 is formed on one side surface of the first light-transmitting medium layer 510.

The fourth film layer F4 may be a light-transmissive organic material, such as polyimide, polycarbonate, polymethyl methacrylate, or the like. The fourth film layer F4 may be formed by a coating method, for example, a slit coating method, a spin coating method, a spray coating method, a roll coating method, or a bar coating method.

S223: as shown in fig. 21, an etching or imprinting process is performed on a surface of the fourth film layer F4 opposite to the first light-transmitting medium layer 510 to form a first exit medium 412 corresponding to the first area A1 and a second exit medium 422 corresponding to the second area A2.

Specifically, a wet etching process or a dry etching process may be used to etch the surface of the fourth film F4 facing away from the display layer 100, or a mold having an inclined plane arranged in an array may be used to imprint the surface of the fourth film F4 facing away from the display layer 100, so that the fourth film F4 facing away from the display layer 100 forms a plurality of right-angle prism structures arranged in an array.

S224: as shown in fig. 22, a fifth film F5 is formed on the surfaces of the first and

second exit media

412 and 422 facing away from the first light-transmitting medium layer 510, so as to form a first incident medium 411 corresponding to the first area A1 and a second incident medium 421 corresponding to the second area A2.

The fifth film layer F5 may be a light-transmissive organic material, such as polyimide, polycarbonate, polymethyl methacrylate, or the like. The fifth film layer F5 may be formed by a coating method, and may be, for example, a slit coating method, a spin coating method, a spray coating method, a roll coating method, or a bar coating method. The fifth film layer F5 may be made of a material having a refractive index different from that of the fourth film layer F4, for example, the refractive index of the fifth film layer F5 is greater than that of the fourth film layer F4.

S225: as further shown in fig. 22, a sixth film F6 is disposed on a surface of the first light-transmitting medium layer 510 opposite to the first and

second exit media

412 and 422, corresponding to the first region A1.

Specifically, a coating process may be used to dispose the sixth film layer F6 on the first light-transmitting medium layer 510. The third film layer F3 may include one or more of silver halide, dichromated gelatin, photopolymer, photoresist, photoconductive thermoplastic, photorefractive crystal.

The patterned sixth film layer F6 corresponding to the first region A1 may be formed through an etching process.

S226: as shown in fig. 23, the sixth film layer F6 is crystallized to form a light modulation structure 300.

S230: as shown in fig. 24, the light splitting structure 200 is disposed on the light emitting surface OA of the display layer 100, such that the orthographic projection of the first area A1 on the display layer 100 at least partially coincides with the first sub-pixel 101, and the orthographic projection of the second area A2 on the display layer 100 at least partially coincides with the second sub-pixel 102.

Fig. 25 to 26 are schematic cross-sectional structure diagrams illustrating steps in still another example of a method of manufacturing a display panel according to an embodiment of the present invention.

s241: as shown in fig. 25, a seventh film layer F7 is formed on the light emitting surface OA.

Specifically, a coating process may be employed to form the seventh film layer F7 on the light emitting surface OA. The seventh film layer F7 may comprise one or more of silver halide, dichromated gelatin, photopolymer, photoresist, photoconductive thermoplastic, photorefractive crystals.

S242: as shown in fig. 26, a first crystallization process is performed corresponding to the first sub-pixel 101 to form the first light modulation structure 310, and a second crystallization process is performed corresponding to the second sub-pixel 102 to form the second light modulation structure 320, such that the active surfaces 302 of the first light modulation structure 310 and the second light modulation structure 320 are relatively inclined.

Specifically, the first crystallization treatment and the second crystallization treatment may be performed by light irradiation, heating, or the like. For example, a first light irradiation process may be performed on the region of the seventh film layer F7 corresponding to the first sub-pixel 101 through a mask having a first pattern to form the first light modulation structure 310, and a second light irradiation process may be performed on the region of the seventh film layer F7 corresponding to the second sub-pixel 102 through a mask having a second pattern to form the second light modulation structure 320. Optionally, the wavelengths of light used for the first and second illumination processes are different.

Fig. 27 to 30 are schematic cross-sectional structure views showing steps in still another example of a method of manufacturing a display panel according to an embodiment of the present invention

s251: as shown in fig. 27, an eighth film layer F8 is formed on the light emitting surface OA.

Specifically, a coating process may be adopted to form the eighth film layer F8 on the light emitting surface OA. The eighth film layer F8 may include one or more of silver halide, dichromated gelatin, photopolymer, photoresist, photoconductive thermoplastic, photorefractive crystal.

S252: as shown in fig. 28, the eighth film layer F8 is subjected to a crystallization process to form a crystal layer.

S253: continuing with FIG. 28, the crystal layer is etched to form a light modulating structure 300 corresponding to the second subpixel 102.

S254: as shown in fig. 29, a ninth film F9 is formed on the light emitting surface OA of the display layer 100 corresponding to the first sub-pixel 101.

The ninth film layer F9 may be a light-transmissive organic material, such as polyimide, polycarbonate, polymethyl methacrylate, or the like.

The initial layer of the ninth film layer F9 may be formed on the light emitting surface OA of the display layer 100 and the light modulating structure 300 by a coating method, such as a slit coating method, a spin coating method, a spray coating method, a roll coating method, or a bar coating method. And, a material removing process such as etching may be performed to remove a portion of the ninth film layer F9 corresponding to the second sub-pixel 102 on the light modulating structure 300.

S255: as shown in fig. 29, an etching or stamping process is performed on the surface of the ninth film layer F9 opposite to the display layer 100 to form a first incident medium 411 corresponding to the first sub-pixel 101.

Specifically, a wet etching process or a dry etching process may be used to etch the surface of the ninth film layer F9 facing away from the display layer 100, or a mold having inclined planes arranged in an array may be used to imprint the surface of the ninth film layer F9 facing away from the display layer 100, so that the ninth film layer F9 facing away from the display layer 100 forms a plurality of right-angle prism structures arranged in an array.

S256: as shown in fig. 30, a tenth film layer F10 is formed on the surface of the first incident medium 411 opposite to the display layer 100 to form a first exiting medium 412 corresponding to the first sub-pixel 101.

The tenth film layer F10 may be a light-transmissive organic material such as polyimide, polycarbonate, polymethyl methacrylate, or the like. The initial layer of the tenth film layer F10 may be formed on the surface of the first incident medium 411 facing away from the display layer 100 and the light modulating structure 300 by a coating method, such as a slit coating method, a spin coating method, a spray coating method, a roll coating method, or a bar coating method. The tenth film layer F10 may be made of a material having a refractive index different from that of the ninth film layer F9, for example, the refractive index of the tenth film layer F10 is smaller than that of the ninth film layer F9.

Moreover, a material removing process such as etching may be performed to remove a portion of the tenth film layer F10 corresponding to the second sub-pixel 102 on the light modulation structure 300, so as to form the first exit medium 412 corresponding to the first sub-pixel 101.

According to the manufacturing method of the display panel, the double-view angle display of the display panel can be realized, the accurate alignment of the first light splitting unit 210 and the first sub-pixel 101 can be further realized, the accurate alignment of at least partial superposition of the second light splitting unit 220 and the second sub-pixel 102 can be further realized, the color crosstalk between the adjacent sub-pixels can be reduced, and the display effect can be improved.

In accordance with the above-described embodiments of the present invention, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A display panel, comprising:

the display layer is provided with a light emitting surface and comprises a plurality of first sub-pixels and a plurality of second sub-pixels which are arranged in an array manner;

the light splitting structure is positioned on one side of the light emitting surface of the display layer and comprises a plurality of first light splitting units and a plurality of second light splitting units which are distributed on a plane parallel to the light emitting surface, the orthographic projection of the first light splitting units on the display layer is at least partially coincided with the first sub-pixels, the orthographic projection of the second light splitting units on the display layer is at least partially coincided with the second sub-pixels, the first light splitting units comprise light modulation structures, the light modulation structures comprise a plurality of sub-structures which are periodically arranged along the plane parallel to the light emitting surface and extend far away from the light emitting surface, and the plurality of sub-structures are provided with a plurality of action surfaces for changing the emitting direction of light entering the light modulation structures;

the first light splitting unit and the second light splitting unit further comprise light deflection structures, each light deflection structure comprises an incident medium and an emergent medium, the incident mediums and the emergent mediums have different refractive indexes, the incident mediums and the emergent mediums are sequentially arranged in a direction perpendicular to the emergent surface and define an interface which is arranged at an acute angle with the emergent surface, and the interface changes the emergent direction of light incident to the light deflection structures;

the first light splitting unit comprises a first light deflection structure, the second light splitting unit comprises a second light deflection structure, the first light deflection structure and the second light deflection structure are arranged on the same layer, the light modulation structure is positioned on one side, back to the light emitting surface, of the first light deflection structure, and the action surface of the light modulation structure is perpendicular to the light emitting surface;

the light rays incident in a first direction corresponding to each first sub-pixel are emitted along a second direction through the first light splitting unit to form a first visual picture, the light rays incident in the first direction corresponding to each second sub-pixel are emitted along a third direction through the second light splitting unit to form a second visual picture, and the first direction, the second direction and the third direction are different in direction.

2. The display panel according to claim 1, wherein the incident medium is a right-angle prism, the right-angle prism comprises two perpendicular-to-perpendicular surfaces and an inclined surface connecting the two perpendicular-to-perpendicular surfaces, one of the two perpendicular-to-perpendicular surfaces is parallel to the light-emitting surface and the other perpendicular to the light-emitting surface, and the inclined surface is the interface.

3. A display panel as claimed in claim 1 characterized in that the light modulating structure and the first light deflecting structure are completely coincident in an orthographic projection of the display layer.

4. A display panel as claimed in claim 3 characterized in that an orthographic projection of the first light deflecting structure on the display layer coincides completely with the first sub-pixel and/or an orthographic projection of the second light deflecting structure on the display layer coincides completely with the second sub-pixel.

5. The display panel according to claim 1,

the first light deflection structure comprises a first incident medium, a first emergent medium and a first interface between the first incident medium and the first emergent medium, the refractive index of the first incident medium is greater than that of the first emergent medium,

the second light deflecting structure comprises a second incident medium, a second emergent medium and a second interface between the second incident medium and the second emergent medium, the refractive index of the second incident medium is greater than that of the second emergent medium,

the inclination angle of the first interface relative to the light emitting surface and the inclination angle of the second interface relative to the light emitting surface are both acute angles or obtuse angles.

6. The display panel according to claim 5, wherein the first incident medium and the second incident medium are disposed in the same film layer and have the same refractive index, and/or the first exiting medium and the second exiting medium are disposed in the same film layer and have the same refractive index;

the first interface surface is parallel to the second interface surface.

7. The display panel of claim 5, wherein the light modulating structure has a refractive index equal to a refractive index of the first exit medium.

8. The display panel according to claim 1, wherein the display panel further comprises:

the first light-transmitting medium layer is positioned on one side, back to the light emitting surface, of the first light deflection structure and the second light deflection structure and is clamped between the light modulation structure and the first light deflection structure;

and the second light-transmitting medium layer is opposite to the light-emitting surface and covers the light modulation structure and the first light-transmitting medium layer, and the refractive index of the second light-transmitting medium layer is greater than or equal to that of the first light-transmitting medium layer.

9. The display panel according to claim 1, wherein the display panel further includes a light shielding layer interposed between the display layer and the light splitting structure or located in the display layer, the light shielding layer includes a first light shielding unit disposed corresponding to the first sub-pixel and a second light shielding unit disposed corresponding to the second sub-pixel, in a direction perpendicular to the light exit surface, orthographic projections of the first light shielding unit and the first light splitting unit on the light exit surface at least partially overlap, and orthographic projections of the second light shielding unit and the second light splitting unit on the light exit surface at least partially overlap.

10. The display panel of claim 9, wherein the first light splitting unit includes a light modulating structure and a first light deflecting structure, wherein the second light splitting unit includes a second light deflecting structure,

in a direction perpendicular to the light emitting surface, the width of the overlapping portion of the orthographic projections of the first light shielding unit and the first light splitting unit on the light emitting surface is smaller than the width of the overlapping portion of the orthographic projections of the second light shielding unit and the second light splitting unit on the light emitting surface.

11. The display panel of claim 1, wherein the light modulating structure is at least one of a volume grating and a reflective array structure.

12. The display panel according to claim 1, wherein the first sub-pixels and the second sub-pixels are alternately arranged in sequence, and the first light splitting units and the second light splitting units are alternately arranged in sequence.

13. The display panel according to claim 5, wherein the plurality of first sub-pixels comprises at least three different colors of the first sub-pixels, and the first incident mediums corresponding to the first sub-pixels with different colors have different refractive indexes and/or the first exit mediums corresponding to the different colors have different refractive indexes, or the first interfaces of the first sub-pixels corresponding to the different colors have different inclination angles with respect to the light exit surface;

the plurality of second sub-pixels comprise at least three second sub-pixels with different colors, the refractive indexes of the second incident mediums corresponding to the second sub-pixels with different colors are different, and/or the refractive indexes of the second emergent mediums corresponding to the second sub-pixels with different colors are different, or the inclination angles of the second interfaces of the second sub-pixels corresponding to the second sub-pixels with different colors relative to the emergent light surface are different.

14. The display panel according to claim 1, further comprising a polarizer sandwiched between the display layer and the light splitting structure.

15. A display device characterized by comprising the display panel according to any one of claims 1 to 14.

16. A method for manufacturing a display panel is characterized by comprising the following steps:

providing a display layer, wherein the display layer comprises a light-emitting surface and a plurality of first sub-pixels and a plurality of second sub-pixels which are arranged in an array;

forming a light splitting structure on the light-emitting surface of the display layer,

the light splitting structure comprises a plurality of first light splitting units and a plurality of second light splitting units which are distributed on a plane parallel to the light emitting surface, orthographic projections of the first light splitting units on the display layer are at least partially overlapped with the first sub-pixels, orthographic projections of the second light splitting units on the display layer are at least partially overlapped with the second sub-pixels, the first light splitting units comprise light modulation structures, the light modulation structures comprise a plurality of sub-structures which are periodically arranged along the plane parallel to the light emitting surface and extend far away from the light emitting surface, and the plurality of sub-structures are provided with a plurality of action surfaces which change the emitting direction of light entering the light modulation structures;

the first light splitting unit and the second light splitting unit further comprise light deflection structures, each light deflection structure comprises an incident medium and an emergent medium, the incident medium and the emergent medium are different in refractive index, the incident medium and the emergent medium are sequentially arranged in a direction perpendicular to the emergent surface and define an interface which is arranged at an acute angle with the emergent surface, the interface changes the emergent direction of light incident to the light deflection structures, the first light splitting unit comprises a first light deflection structure, the second light splitting unit comprises a second light deflection structure, the first light deflection structure and the second light deflection structure are arranged on the same layer, the light modulation structure is located on the side, back to the emergent surface, of the first light deflection structure, and the action surface of the light modulation structure is perpendicular to the emergent surface.

17. The method as claimed in claim 16, wherein the step of forming a light splitting structure on the light emitting surface of the display layer comprises:

forming a first film layer on the light-emitting surface of the display layer;

etching or embossing the surface of the first film layer, which faces away from the display layer, so as to form a first incident medium corresponding to the first sub-pixel and a second incident medium corresponding to the second sub-pixel;

forming a second film layer on the surfaces of the first incident medium and the second incident medium, which are opposite to the display layer, so as to form a first emergent medium corresponding to the first sub-pixel and a second emergent medium corresponding to the second sub-pixel;

arranging a third film layer on one side of the first emergent medium back to the display layer;

and carrying out crystallization treatment on the third film layer to form the light modulation structure.

18. The method as claimed in claim 16, wherein the step of forming a light splitting structure on the light emitting surface of the display layer comprises:

forming the light splitting structure, including:

providing a first light-transmitting medium layer, wherein the first light-transmitting medium layer comprises a plurality of first areas and a plurality of second areas which are arranged in an array;

forming a fourth film layer on the surface of one side of the first light-transmitting medium layer;

etching or embossing the surface of the fourth film layer, which is opposite to the first light-transmitting medium layer, so as to form a first emergent medium corresponding to the first area and a second emergent medium corresponding to the second area;

forming a fifth film layer on the surfaces of the first emergent medium and the second emergent medium, which are opposite to the first light-transmitting medium layer, so as to form a first incident medium corresponding to the first area and a second incident medium corresponding to the second area;

a sixth film layer is arranged on the surface of one side, back to the first emergent medium and the second emergent medium, of the first light-transmitting medium layer, corresponding to the first area;

performing crystallization treatment on the sixth film layer to form the light modulation structure;

and arranging the light splitting structure on the light emergent surface of the display layer, so that the orthographic projection of the first area on the display layer is at least partially overlapped with the first sub-pixel, and the orthographic projection of the second area on the display layer is at least partially overlapped with the second sub-pixel.